[robotdiggme]

What's the final RPM for NEMA 23 Brake stepper motor? How to caculate?

[109jb]

That is dependent on how much load. Each motor has a torque curve, and steppers have highest torque at 0 rpm. As speed increases, the torque drops. Once the torque the motor supplies drops below the load torque, the motor will stall. The problem is that many times you don't have the motor torque curves, and these curves are dependent on the voltage, current, microstepping, and even the driver used. Also, the load torque may be increasing with speed.

[robotdiggme]

Thanks. So, usually I was recommended to set the RobotDigg stepperg motor current is within the rated current range, such as a rated current of 2.8A motor drive is provided on the current recommended 2.8A or less than 2.8A, high fever should not be severe long-term use. At less than 2.8A, the torque output is relatively small, the speed is also limited. Voltage is equivalent to the throttle, the higher the voltage, the maximum achievable speed is also bigger, but to the stepping motor can withstand within range.

[109jb]

The current should be set to what the motor is rated for, in your case 2.8a. The voltage should be about

v = sqrt(inductance) * 32